Turbine-blading.



W. J. A. LONDON.

' TURBINE BLADING. APPLICATION. FILEDOCT. 1. 1913.

1,178,452., Patented Apr. 4, 1916.

INVENTOR.

WITN

William J A. London:

m. ZMQM A T] 'ORNE Y i iii WILLIAM J. A. LONDON, or HARTFORD,coNNEoTIoUT, assrelvort; To THE TERRY STEAM TURBINE COMPANY, or HARTF RCONNECTICUT A CORPORATION or v CONNECTICUT. v 1, TURBINE-BL DING. p y

,jspecification of Letters Patent. l Patented A 4 1916 To all whom itmay concern:

Be it known that I, IVILLIAM J. A. LoN-v DON, a subject of the King ofEngland, and resident of Hartford, county of Hartford, and State ofConnecticut, have invented certain new and useful Improvements in viewthereof with one of theside plates removed. Figs. 3 and 4 are detailviews show-' ing the blade roots and packing pieces.

Referring to the drawings a denotes the rim of the rotor which may be acontinuous ring or may be of segments butted end to end. This rim istransversely slotted in its outer periphery as at b to receive the roots0 of the blades (Z, and usually packing pieces 6, it being understoodthat the roots have fiat front and irregular rear faces, the packingpieces fitting in back of the roots and filling the slots I).

Then all of the blades and packing pieces have been assembled on therim, circumferential grooves f are cut in the rim, roots and packingpieces at both sides. Side plates g, 9, having beads h, h, which fit inthe grooves f, f, are next applied and clamped to the rim in anyconvenient manner as by the headed pins 2'. The rim is provided withcircumferential side shoulders 70, vis, to which the side plates 9, g,are fitted to withstand the centrifugal force occasioned by the rotationof the rotor.

At the center of the side plates a suitable hub-may be provided by whichthe rotor 'may be mounted on a shaft. The outer ends of the blades maybe shrouded in any desired manner as 1s usual in structures of thissort.

The securing means herelnabove described constitute an extremely strongand secure fastening which may be economically manufactured, and one inwhich the parts are well supported against the heavy strains to whichthey are subjected.

I intend to secure herein any changes or modifications in the structurewhich'come within the scope of the appended claims.

sectional view of part of a rotor showing the blade-fastening means.Fig. 2 1s a side.

I claim as my invention 1. In a blade-fastening device of thecharacterdescribed, a rim transversely slotted,

in its periphery, blades with roots located 1n sa1d slots, alinedgrooves in the sides of said rim and the edges of said roots, platessecured to the sides of said rim, and beads thereon adapted to fit saidgrooves 2. In a blade-fastening device of the character described, anannular rim having transverse slots in its outer edge, laterallyextending shoulders at thesides of the rim below the slots,circumferential grooves in the sides of the, slotted portion of the rim,blades with their roots located in the slots and with their edgesgrooved, in alinement with the grooves in the rim, side plates fitted tosaidrim and provided with shoulders adapted to engage theshoulders onthe rim, and beads'adaptedto fit in the grooves and interengaging partson said plates and roots. p

4. In a blade-fastening device of the character described, a rim havingits outer edge transversely slotted, blades with roots fitting in saidslots, side plates located against the sides of the rim, means forholding them inposition, interengaging parts on said plates and rim,packing pieces located in the slots back of the'blade roots,

and interlocking parts onsaid plates and I said blade roots and packingpieces.

' 5.'In a device of the character described, a shaft, a rim providedwith lateral shoulders at its base'and transversely slotted in itsperiphery, blades with roots fitting said slots, circumferential groovesin thesides of the slotted portion of the rim, notches in the bladeroots alined with said grooves,

plates secured to said'shaft and supporting said rimbetween them;shoulders on the plates engaging the shoulders on the rim, and beads onthe plates fitting in the grooves and notchesin the rim and blade roots.

6. In a device of the character described, a shaft, a rim provided withlateral shouldersat its base and transversely slotted in its periphery,blades With roots fitting said and notches in the rim and blade roots,and slots, circumferential grooves in the sides means located justinside of said rim for 10 of the slotted portion of the rim, notches inclamping said plates onto said rim.

the blade roots alined With said grooves, T plates secured to said shaftand supporting WILLIAM LOND01\' said rim between them, shouldersv on theWitnesses:

plates engaging the shoulders on the rim, H. E. HART,

beads on the plates fitting in the grooves A. E. OBRIEN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, D. G.

